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<p>As a novel lightweight metallic material with excellent heat and corrosion resistance, elastic disordered microporous metal rubber (EDMMR) functions as an effective damping and support element in high-temperature environments where traditional polymer rubber fails. In this paper, a multi-scale finite element model for EDMMR is constructed using virtual manufacturing technology (VMT). Thermo-mechanical coupling analysis reveals a distinct inward expansion and dissipation phenomenon in EDMMR under high-temperature conditions, distinguishing it from porous materials. This phenomenon has the potential to impact the overall dimensions of EDMMR through transmission and accumulation processes. The experimental results demonstrate a random distribution of internal micro springs in EDMMR, considering the contact composition of spring microelements and the pore structure. By incorporating material elasticity, a predictive method for the thermal expansion coefficient of EDMMR based on the Schapery model is proposed. Additionally, standardized processes are employed to manufacture multiple sets of cylindrical EDMMR samples with similar dimensions but varying porosities. Thermal expansion tests are conducted on these samples, and the accuracy of the predicted thermal expansion coefficient is quantitatively validated through residual analysis. This research indicates that EDMMR maintains good structural stability in high-temperature environments. The thermal expansion rate of the material exhibits an opposite trend to the variation of elastic modulus with temperature, as the porosity rate changes.</p>

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Development of a Predictive Model for the Thermal Expansion Coefficient of Elastic Disordered Microporous Metal Rubber Based on Virtual Manufacturing Technology

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月12日

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  • Zhiying Ren,
  • Qinwei Wang,
  • Rongzheng Fang,
  • Zihao Huang,
  • Xianjie Shi

摘要

As a novel lightweight metallic material with excellent heat and corrosion resistance, elastic disordered microporous metal rubber (EDMMR) functions as an effective damping and support element in high-temperature environments where traditional polymer rubber fails. In this paper, a multi-scale finite element model for EDMMR is constructed using virtual manufacturing technology (VMT). Thermo-mechanical coupling analysis reveals a distinct inward expansion and dissipation phenomenon in EDMMR under high-temperature conditions, distinguishing it from porous materials. This phenomenon has the potential to impact the overall dimensions of EDMMR through transmission and accumulation processes. The experimental results demonstrate a random distribution of internal micro springs in EDMMR, considering the contact composition of spring microelements and the pore structure. By incorporating material elasticity, a predictive method for the thermal expansion coefficient of EDMMR based on the Schapery model is proposed. Additionally, standardized processes are employed to manufacture multiple sets of cylindrical EDMMR samples with similar dimensions but varying porosities. Thermal expansion tests are conducted on these samples, and the accuracy of the predicted thermal expansion coefficient is quantitatively validated through residual analysis. This research indicates that EDMMR maintains good structural stability in high-temperature environments. The thermal expansion rate of the material exhibits an opposite trend to the variation of elastic modulus with temperature, as the porosity rate changes.